Britney, who joined The X Factor USA as a judge after signing a reported $15m deal, has been making the headlines ever since she was announced as a panellist, such is public interest in her.

And it seems the general public aren’t the only ones to be interested in the Womaniser singer, as her boss Simon Cowell has spoken out about her ‘mystique’, warning that she is more than just a TV judge.

He told People: ‘She’s not on the show to be Britney Spears on a TV show.She’s actually there to prove to the world there’s more to her, and she’s got the ability to do this job really well. She’s taken the role really seriously.’Cowell continued: ‘It’s quite interesting because when someone has done what she’s done as she has with her career, and being such a public person, you kind of think she is going to be very confident, but in real life she’s shy.

Simon can’t take his eyes off Britney as they share the X Factor panel (Picture: Twitter)

‘There’s kind of a mystique about her which I think is what kind of attracted me to her in the place.’

Meanwhile, Britney and Simon’s fellow judge Demi Lovato has joked about who he does and doesn’t like on the X Factor USA judging panel

‘Everyone is really great except for Simon,’ she said at the Providence auditions.’We have fun together; he does tease me a lot, and I give it back to him. I don’t mind. He’s sometimes not very nice to me, but I have fun.’The former Disney star went on to describe how difficult she found some elements of the the X Factor process, saying: ‘Saying no to people is really hard, and emotionally it messes with you a little bit.’